Authors: Kucera, Jindrich - Orel, Vladimir - Guth, Dr. V. - Laska, Dr. V. - Slouka, Hubert - Behounek, Dr. Fr.

Publisher: Nakladatelstvi Vl. Orel, Praha 1931

4° - 8 Single-issues complete 678-642- 593-594-594-584-603-594pp - B/w Photo-reproductions. 20th Century Encyclopedia I. outer space and our country - II. Nature man - III. Rise of materials and forces- IV. Centuries of the Techniques - V. progress of the industry - VI. Nations and states - VII. From the mental workshop of humanity - VIII. New directions and currents. First edition, text in Czech language. Typo design and covers by Jindrich Kucera. Original wrappers (Montages by Jindrich Kucera. In Very good condition